<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品添加</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert title="商品添加区域" type="info" center show-icon> </el-alert>
      <!-- 步骤条 -->
      <el-steps
        :space="200"
        align-center
        :active="activeIndex - 0"
        finish-status="success"
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- Tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormrules"
        ref="addFormRef"
        label-position="top"
        label-width="100px"
        class="demo-ruleForm"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeCat"
          @tab-click="tabClick"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input
                v-model="addForm.goods_name"
                placeholder="请输入商品名称"
              ></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input
                v-model="addForm.goods_price"
                type="number"
                placeholder="请输入商品价格"
              ></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input
                v-model="addForm.goods_number"
                type="number"
                placeholder="请输入商品数量"
              ></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input
                v-model="addForm.goods_weight"
                type="number"
                placeholder="请输入商品重量"
              ></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="Cate"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTabData"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTabData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action 图片上传到的API网址 -->
            <!-- on-preview 图片的上传事件 -->
            <!-- on-remove 图片的移除事件 -->
            <!-- list-type 图片显示的样式 -->
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headersObj"
              :on-success="handPoto"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加按钮 -->
            <el-button type="primary" @click="add()" class="AddBtn">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览对话框 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previeVisible"
      width="50%"
    >
    <img :src="previewPath" style="width:100%">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_number: 0,
        goods_weight: 0,
        // 保存分类选项中的数据
        goods_cat: [],
        //图片路径
        pics: [],
        // 富文本
        goods_introduce:'',
        //
        attrs:[]

      },
      // 分类级联选择器
      Cate: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      addFormrules: {
        goods_name: [
          { required: true, message: '该项不能为空', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '该项不能为空', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '该项不能为空', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '该项不能为空', trigger: 'blur' }
        ],
        goods_cat: { required: true, message: '请选中三级分类', trigger: 'blur' }
      },
      //保存分类数据
      cateList: [],
      //保存动态参数
      manyTabData: [],
      //保存静态参数
      onlyTabData: [],
      //后台API图片上传的网址
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      //图片上传组件header请求头对象
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      //预览图片的路径
      previewPath: '',
      //图片预览对话框
      previeVisible:false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    // 获取所有的分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取分类数据失败')
      }
      this.cateList = res.data
    },
    // 级联选择器的值发生变化会触发这个函数
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeCat(active, old) {
      if (old == '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请选择商品分类')
        return false
      }
    },
    async tabClick() {
      //判断是否点击的是参数列表
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200) {
          return //this.$message.error('获取动参数列表数据失败')
        }
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTabData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败')
        }
        this.onlyTabData = res.data
      }
    },
    // 图片的预览效果
    handlePreview(file) {
      this.previewPath=file.response.data.url
      this.previeVisible=true

    },
    //图片移除事件
    handleRemove(file) {
       // 1. 获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2. 从 pics 数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      // 3. 调用数组的 splice 方法，把图片信息对象，从 pics 数组中移除
      this.addForm.pics.splice(i, 1)
    },
    //获取图片路径并保存
    handPoto(respose) {
      const picInfo = { pic: respose.data.tmp_path }
      // 将图片对象信息添加到数组中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm.pics)
    },
    //添加商品
    add(){
      this.$refs.addFormRef.validate(async vali=>{
        if(!vali) return this.$message.error('请填写表单必填项')
      
        const from = _.cloneDeep(this.addForm)
        from.goods_cat = from.goods_cat.join(',')
        //处理动态参数
        this.manyTabData.forEach(item=>{
          const newInfo = {
            attr_id:item.attr_id,
            attr_value:item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        //处理静态属性
        this.onlyTabData.forEach(item=>{
          const newInfo={
            attr_id:item.attr_id,
            attr_value:item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        from.attrs = this.addForm.attrs
        //发起请求添加商品
        //商品的名称，必须是唯一的
        const {data:res} = await this.$http.post('goods',from)
        if(res.meta.status !== 201)
          return this.$message.error('添加商品失败')
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }

  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 !important;
}

.AddBtn{
  margin-top: 10px;
}
</style>
